e-24. Radiation Therapy on Acromegery

Watari, T; Irie, Minoru

doi:10.2176/nmc.10.135a

Neurol. Med. Chir.(Tokyo)

1968

DOI: 10.2176/nmc.10.135a

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e-24. Radiation Therapy on Acromegery

T Watari

Minoru Irie

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2007

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“…For free vibration, there is the logarithmic decrement for viscous damping [15,16], and the constant decrement for Coulomb damping [17], and combined damping [18][19][20].…”

mentioning

confidence: 99%

Estimating Damping Parameters in Multi-Degree-of-Freedom Vibration Systems by Balancing Energy

Feeny

2007

Volume 1: 21st Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C

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A method of estimating damping parameters for multidegree-of-freedom vibration systems is outlined, involving a balance of dissipated and supplied energies over a cycle of periodic vibration. The power is formulated as the inner product between velocity and force terms, and integrated over a cycle. Conservative terms (mass and stiffness) drop out of the formulation. The displacement response and the input are measured, and the damping coefficients are estimated without knowledge of the mass and stiffness, which can be nonlinear, as illustrated in one example. The identification equations are also obtained with a modal reduction based on proper orthogonal decomposition. The method can be applied with a harmonic motion assumption, or by simple numerical integration. The method is illustrated with linear and quadratic damping, in simulations of a four degree-of-freedom system, and in a string with and without noise.

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“…For free vibration, there is the logarithmic decrement for viscous damping [15,16], and the constant decrement for Coulomb damping [17], and combined damping [18][19][20].…”

mentioning

confidence: 99%

Estimating Damping Parameters in Multi-Degree-of-Freedom Vibration Systems by Balancing Energy

Feeny

2007

Volume 1: 21st Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C

View full text Add to dashboard Cite

show abstract

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e-24. Radiation Therapy on Acromegery

Cited by 1 publication

References 0 publications

Estimating Damping Parameters in Multi-Degree-of-Freedom Vibration Systems by Balancing Energy

Estimating Damping Parameters in Multi-Degree-of-Freedom Vibration Systems by Balancing Energy

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